<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../js/jquery-1.12.4.js"></script>
<script>
    $(function () {
f()
        orderId()
        dateCart()
    })
    function f() {
        $("#Province").html("<option value='请选择'>请选择</option>")
        $("#City").html("<option value='请选择'>请选择</option>")
        $("#District").html("<option value='请选择'>请选择</option>")
    }
    function orderId() {
        var vNow = new Date();
        var sNow = "";
        sNow += String(vNow.getFullYear());
        sNow += String(vNow.getMonth() + 1);
        sNow += String(vNow.getDate());
        sNow += String(vNow.getHours());
        sNow += String(vNow.getMinutes());
        sNow += String(vNow.getSeconds());
        sNow += String(vNow.getMilliseconds());
       $("#div1").html(sNow)
    }
    function dateCart() {
        let vNow = new Date();
        let sNow = "";
        sNow += String(vNow.getFullYear()+"-");
        sNow += String(vNow.getMonth() + 1+"-");
        sNow += String(vNow.getDate());
        $("#div2").html(sNow)
    }
</script>
</head>
<body>
<div id="div1"></div>
<div id="div2"></div>

<!-- 下拉框 -->
请选择省份：
<select id="Province">

</select>
请选择城市：
<select id="City">

</select>
请选择县/区：
<select id="District">

</select>
<input type="button" value="啊沙发沙发" onclick="f()">
<!-- 导入js文件 -->
<script src="js/city.js"></script>
<script src="js/cascading.js"></script>
</body>
</html>